6. Electricity A. is a valuable form of energy since it can be used for many purposes.
B. is difficult to transport.
C. is primarily produced from wind, solar, and other renewable technologies.
D. can be converted to a fossil fuel.

The number of living organisms in a particular area is

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

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